Positions quoted in this Preliminary Notice reproduced below are referred to WGS84 or a compatible datum and may be plotted directly on this ENC. 											
Some or all of the information contained in this Notice to Mariners may have been included on the ENCs affected.												
												
800(P)/26 MEXICO  Gulf of Mexico Depths.												
Source: ENCs MX683211 and MX583210												
												
	1.	Depths less than charted exist within Dos Bocas. The most significant are as follows:										
												
		Depth				Position
				
		106m				18 25' .945N.,93 12' .159W.	
			
		98m				18 25' .981N.,93 12' .133W.
				
		94m				18 26' .023N.,93 12' .105W.	
			
		38m				18 26' .619N.,93 11' .510W.	
			
		71m				18 25' .956N.,93 11' .322W.	
			
		72m				18 25' .875N.,93 11' .330W.	
			
		49m				18 26' .004N.,93 11' .212W.	
			
		7m				18 26' .010N.,93 11' .157W.	
			
		61m				18 26' .005N.,93 11' .032W.
				
		53m				18 25' .878N.,93 12' .594W.	
			
		93m				18 27' .35N.,93 13' .45W.
				
		176m				18 28' .97N.,93 08' .36W.
				
		199m				18 28' .88N.,93 11' .43W.	
			
												
	2.	*Depths deeper than charted exist within the Port of Dos Bocas. The most significant are as follows:										
												
		Depth				Position
				
		14m				18 27' .161N.,93 12' .511W.	
			
		133m				18 27' .077N.,93 12' .396W.	
			
		128m				18 26' .988N.,93 12' .389W.	
			
		131m				18 26' .915N.,93 12' .305W.	
			
		123m				18 26' .778N.,93 12' .334W.	
			
		131m				18 27' .235N.,93 12' .208W.	
			
		136m				18 26' .863N.,93 12' .092W.	
			
		122m				18 26' .708N.,93 12' .113W.	
			
												
	3.	*A new pier has been established, joining the following positions:										
												
		18 26' .069N.,93 12' .059W.	
									
		18 26' .299N.,93 12' .142W.	
									
												
	4.	*A restricted area, Security Zone III, prohibiting all activity except that required for oil exploration and production, has been established joining the following positions:										
												
		18 27' .63N.,93 16' .42W.
										
		18 27' .10N.,93 15' .40W.
										
		18 36' .40N.,93 07' .40W.	
									
		18 40' .16N.,93 06' .88W.										
												
	5.	and										
												
		18 40' .60N.,93 11' .46W.	
									
		18 38' .65N.,93 16' .42W.	
									
												
	6.	*Restricted areas, prohibiting fishing and diving, and with a maximum navigation speed of 5 knots, have been established, joining the following positions:										
												
		18 28' .00N.,93 15' .00W.	
									
		18 32' .40N.,93 15' .00W.	
									
		18 32' .40N.,93 11' .60W.	
									
		18 28' .90N.,93 11' .60W.	
									
		18 28' .00N.,93 12' .65W.										
												
	7.	and										
												
		18 28' .62N.,93 08' .40W.	
									
		18 29' .50N.,93 08' .40W.
										
		18 32' .10N.,93 09' .90W.	
									
		18 32' .40N.,93 11' .60W.	
									
		18 28' .90N.,93 11' .60W.	
									
		18 28' .00N.,93 12' .65W.										
												
	8.	and										
												
		18 28' .00N.,93 14' .92W.	
									
		18 27' .50N.,93 14' .90W.	
									
		18 27' .50N.,93 09' .10W.										
												
	9.	Mariners are advised to navigate with caution in the area and consult the local port authorities for the latest information.										
												
	10.	*These changes will be included in the next New Edition of Chart 359.										
												
	11.	*Charts 2626 and 1307 will be updated by Notice to Mariners.										
												
	12.	*Former Notice 2711(P)/24 is cancelled.										
												
		*Indicates new or revised entry.										
												
		(WGS84 DATUM)